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Commit a0bae57f authored by Damien Lespiau's avatar Damien Lespiau Committed by Daniel Vetter
Browse files

drm/i915: Provide a command line option to disable display 



If we can't actually determine at run-time we have a fused-off display,
provide at least an option to disable it.

v2: Move the i915.disable_display test in a separate check
    (Daniel Vetter)

Signed-off-by: default avatarDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 658ac4c6

drivers/gpu/drm/i915/i915_dma.c

+6 −3
Original line number Diff line number Diff line
@@ -1483,7 +1483,10 @@ static void intel_device_info_runtime_init(struct drm_device *dev) 
	if (IS_VALLEYVIEW(dev))

		info->num_sprites = 2;



	if (info->num_pipes > 0 &&

	if (i915.disable_display) {

		DRM_INFO("Display disabled (module parameter)\n");

		info->num_pipes = 0;

	} else if (info->num_pipes > 0 &&

		   (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&

		   !IS_VALLEYVIEW(dev)) {

		u32 fuse_strap = I915_READ(FUSE_STRAP);

drivers/gpu/drm/i915/i915_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -1958,6 +1958,7 @@ struct i915_params { 
	bool fastboot;

	bool prefault_disable;

	bool reset;

	bool disable_display;

};

extern struct i915_params i915 __read_mostly;

drivers/gpu/drm/i915/i915_params.c

+4 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ struct i915_params i915 __read_mostly = { 
	.prefault_disable = 0,

	.reset = true,

	.invert_brightness = 0,

	.disable_display = 0,

};



module_param_named(modeset, i915.modeset, int, 0400);
@@ -153,3 +154,6 @@ MODULE_PARM_DESC(invert_brightness, 
	"report PCI device ID, subsystem vendor and subsystem device ID "

	"to dri-devel@lists.freedesktop.org, if your machine needs it. "

	"It will then be included in an upcoming module version.");



module_param_named(disable_display, i915.disable_display, bool, 0600);

MODULE_PARM_DESC(disable_display, "Disable display (default: false)");